network/sysctl-monitor: do not allocate sysctl_shadow when eBPF is not supported

When eBPF is disabled, the hashmap will be never used. Let's not
allocate it.

diff --git a/src/network/networkd-ipv6ll.c b/src/network/networkd-ipv6ll.c
index 0daf3ad8ab7347e4e5eea2a8e415668084b89a79..04f51ab530f26cf1ca24d37074bab9fb3cc95bc4 100644 (file)
--- a/src/network/networkd-ipv6ll.c
+++ b/src/network/networkd-ipv6ll.c
@@ -221,7 +221,7 @@ int link_set_ipv6ll_stable_secret(Link *link) {
         }
 
         return sysctl_write_ip_property(AF_INET6, link->ifname, "stable_secret",
-                                        IN6_ADDR_TO_STRING(&a), &link->manager->sysctl_shadow);
+                                        IN6_ADDR_TO_STRING(&a), manager_get_sysctl_shadow(link->manager));
 }
 
 int link_set_ipv6ll_addrgen_mode(Link *link, IPv6LinkLocalAddressGenMode mode) {
@@ -232,7 +232,7 @@ int link_set_ipv6ll_addrgen_mode(Link *link, IPv6LinkLocalAddressGenMode mode) {
         if (mode == link->ipv6ll_address_gen_mode)
                 return 0;
 
-        return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "addr_gen_mode", mode, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "addr_gen_mode", mode, manager_get_sysctl_shadow(link->manager));
 }
 
 static const char* const ipv6_link_local_address_gen_mode_table[_IPV6_LINK_LOCAL_ADDRESS_GEN_MODE_MAX] = {

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 631ab8556264351a3e98dd47dbd052ff6b4eb078..f172e0d8654bbc7de45930539e8987bfde43f869 100644 (file)
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -624,8 +624,6 @@ Manager* manager_free(Manager *m) {
         HASHMAP_FOREACH(link, m->links_by_index)
                 (void) link_stop_engines(link, true);
 
-        m->sysctl_shadow = hashmap_free(m->sysctl_shadow);
-
         m->request_queue = ordered_set_free(m->request_queue);
         m->remove_request_queue = ordered_set_free(m->remove_request_queue);
 

diff --git a/src/network/networkd-manager.h b/src/network/networkd-manager.h
index 5a0decced243d817f6c10cd25be67762eb374abb..9a310c2eab614cc08db263d31238d929a5069dfb 100644 (file)
--- a/src/network/networkd-manager.h
+++ b/src/network/networkd-manager.h
@@ -150,4 +150,12 @@ int manager_set_timezone(Manager *m, const char *timezone);
 
 int manager_reload(Manager *m, sd_bus_message *message);
 
+static inline Hashmap** manager_get_sysctl_shadow(Manager *manager) {
+#if HAVE_VMLINUX_H
+        return &ASSERT_PTR(manager)->sysctl_shadow;
+#else
+        return NULL;
+#endif
+}
+
 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);

diff --git a/src/network/networkd-ndisc.c b/src/network/networkd-ndisc.c
index 81835c06e573544b89986ef203dfcab2476a3e86..529311f4a4173f69ae9ed89993d0d9e3f37ce7de 100644 (file)
--- a/src/network/networkd-ndisc.c
+++ b/src/network/networkd-ndisc.c
@@ -987,7 +987,7 @@ static int ndisc_router_process_reachable_time(Link *link, sd_ndisc_router *rt)
         }
 
         /* Set the reachable time for Neighbor Solicitations. */
-        r = sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "base_reachable_time_ms", (uint32_t) msec, &link->manager->sysctl_shadow);
+        r = sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "base_reachable_time_ms", (uint32_t) msec, manager_get_sysctl_shadow(link->manager));
         if (r < 0)
                 log_link_warning_errno(link, r, "Failed to apply neighbor reachable time (%"PRIu64"), ignoring: %m", msec);
 
@@ -1021,7 +1021,7 @@ static int ndisc_router_process_retransmission_time(Link *link, sd_ndisc_router
         }
 
         /* Set the retransmission time for Neighbor Solicitations. */
-        r = sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "retrans_time_ms", (uint32_t) msec, &link->manager->sysctl_shadow);
+        r = sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "retrans_time_ms", (uint32_t) msec, manager_get_sysctl_shadow(link->manager));
         if (r < 0)
                 log_link_warning_errno(link, r, "Failed to apply neighbor retransmission time (%"PRIu64"), ignoring: %m", msec);
 
@@ -1057,7 +1057,7 @@ static int ndisc_router_process_hop_limit(Link *link, sd_ndisc_router *rt) {
         if (hop_limit <= 0)
                 return 0;
 
-        r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "hop_limit", (uint32_t) hop_limit, &link->manager->sysctl_shadow);
+        r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "hop_limit", (uint32_t) hop_limit, manager_get_sysctl_shadow(link->manager));
         if (r < 0)
                 log_link_warning_errno(link, r, "Failed to apply hop_limit (%u), ignoring: %m", hop_limit);
 

diff --git a/src/network/networkd-sysctl.c b/src/network/networkd-sysctl.c
index e7b421959a220bee04d76db35282fb5d3e347c54..7330c2cc76067b171fac1c08ba4c77bae2d31906 100644 (file)
--- a/src/network/networkd-sysctl.c
+++ b/src/network/networkd-sysctl.c
@@ -167,6 +167,7 @@ void sysctl_remove_monitor(Manager *manager) {
         manager->sysctl_link = bpf_link_free(manager->sysctl_link);
         manager->sysctl_skel = sysctl_monitor_bpf_free(manager->sysctl_skel);
         manager->cgroup_fd = safe_close(manager->cgroup_fd);
+        manager->sysctl_shadow = hashmap_free(manager->sysctl_shadow);
 }
 
 int sysctl_clear_link_shadows(Link *link) {
@@ -209,13 +210,13 @@ static void manager_set_ip_forwarding(Manager *manager, int family) {
                 return; /* keep */
 
         /* First, set the default value. */
-        r = sysctl_write_ip_property_boolean(family, "default", "forwarding", t, &manager->sysctl_shadow);
+        r = sysctl_write_ip_property_boolean(family, "default", "forwarding", t, manager_get_sysctl_shadow(manager));
         if (r < 0)
                 log_warning_errno(r, "Failed to %s the default %s forwarding: %m",
                                   enable_disable(t), af_to_ipv4_ipv6(family));
 
         /* Then, set the value to all interfaces. */
-        r = sysctl_write_ip_property_boolean(family, "all", "forwarding", t, &manager->sysctl_shadow);
+        r = sysctl_write_ip_property_boolean(family, "all", "forwarding", t, manager_get_sysctl_shadow(manager));
         if (r < 0)
                 log_warning_errno(r, "Failed to %s %s forwarding for all interfaces: %m",
                                   enable_disable(t), af_to_ipv4_ipv6(family));
@@ -260,7 +261,7 @@ static int link_update_ipv6_sysctl(Link *link) {
         if (!link_ipv6_enabled(link))
                 return 0;
 
-        return sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_proxy_arp(Link *link) {
@@ -273,7 +274,7 @@ static int link_set_proxy_arp(Link *link) {
         if (link->network->proxy_arp < 0)
                 return 0;
 
-        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_proxy_arp_pvlan(Link *link) {
@@ -286,7 +287,7 @@ static int link_set_proxy_arp_pvlan(Link *link) {
         if (link->network->proxy_arp_pvlan < 0)
                 return 0;
 
-        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp_pvlan", link->network->proxy_arp_pvlan > 0, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp_pvlan", link->network->proxy_arp_pvlan > 0, manager_get_sysctl_shadow(link->manager));
 }
 
 int link_get_ip_forwarding(Link *link, int family) {
@@ -328,7 +329,7 @@ static int link_set_ip_forwarding_impl(Link *link, int family) {
         if (t < 0)
                 return 0; /* keep */
 
-        r = sysctl_write_ip_property_boolean(family, link->ifname, "forwarding", t, &link->manager->sysctl_shadow);
+        r = sysctl_write_ip_property_boolean(family, link->ifname, "forwarding", t, manager_get_sysctl_shadow(link->manager));
         if (r < 0)
                 return log_link_warning_errno(link, r, "Failed to %s %s forwarding, ignoring: %m",
                                               enable_disable(t), af_to_ipv4_ipv6(family));
@@ -405,7 +406,7 @@ static int link_set_ipv4_rp_filter(Link *link) {
         if (link->network->ipv4_rp_filter < 0)
                 return 0;
 
-        return sysctl_write_ip_property_int(AF_INET, link->ifname, "rp_filter", link->network->ipv4_rp_filter, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_int(AF_INET, link->ifname, "rp_filter", link->network->ipv4_rp_filter, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_privacy_extensions(Link *link) {
@@ -425,7 +426,7 @@ static int link_set_ipv6_privacy_extensions(Link *link) {
         if (val == IPV6_PRIVACY_EXTENSIONS_KERNEL)
                 return 0;
 
-        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) val, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) val, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_accept_ra(Link *link) {
@@ -435,7 +436,7 @@ static int link_set_ipv6_accept_ra(Link *link) {
         if (!link_is_configured_for_family(link, AF_INET6))
                 return 0;
 
-        return sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0", &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0", manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_dad_transmits(Link *link) {
@@ -448,7 +449,7 @@ static int link_set_ipv6_dad_transmits(Link *link) {
         if (link->network->ipv6_dad_transmits < 0)
                 return 0;
 
-        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_hop_limit(Link *link) {
@@ -461,7 +462,7 @@ static int link_set_ipv6_hop_limit(Link *link) {
         if (link->network->ipv6_hop_limit <= 0)
                 return 0;
 
-        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_retransmission_time(Link *link) {
@@ -480,7 +481,7 @@ static int link_set_ipv6_retransmission_time(Link *link) {
          if (retrans_time_ms <= 0 || retrans_time_ms > UINT32_MAX)
                 return 0;
 
-        return sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "retrans_time_ms", retrans_time_ms, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_neighbor_property_uint32(AF_INET6, link->ifname, "retrans_time_ms", retrans_time_ms, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv6_proxy_ndp(Link *link) {
@@ -497,7 +498,7 @@ static int link_set_ipv6_proxy_ndp(Link *link) {
         else
                 v = !set_isempty(link->network->ipv6_proxy_ndp_addresses);
 
-        return sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "proxy_ndp", v, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "proxy_ndp", v, manager_get_sysctl_shadow(link->manager));
 }
 
 int link_set_ipv6_mtu(Link *link, int log_level) {
@@ -525,7 +526,7 @@ int link_set_ipv6_mtu(Link *link, int log_level) {
                 mtu = link->mtu;
         }
 
-        return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", mtu, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", mtu, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv4_accept_local(Link *link) {
@@ -538,7 +539,7 @@ static int link_set_ipv4_accept_local(Link *link) {
         if (link->network->ipv4_accept_local < 0)
                 return 0;
 
-        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local > 0, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local > 0, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv4_route_localnet(Link *link) {
@@ -551,7 +552,7 @@ static int link_set_ipv4_route_localnet(Link *link) {
         if (link->network->ipv4_route_localnet < 0)
                 return 0;
 
-        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "route_localnet", link->network->ipv4_route_localnet > 0, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "route_localnet", link->network->ipv4_route_localnet > 0, manager_get_sysctl_shadow(link->manager));
 }
 
 static int link_set_ipv4_promote_secondaries(Link *link) {
@@ -566,7 +567,7 @@ static int link_set_ipv4_promote_secondaries(Link *link) {
          * otherwise. The way systemd-networkd works is that the new IP of a lease is added as a
          * secondary IP and when the primary one expires it relies on the kernel to promote the
          * secondary IP. See also https://github.com/systemd/systemd/issues/7163 */
-        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "promote_secondaries", true, &link->manager->sysctl_shadow);
+        return sysctl_write_ip_property_boolean(AF_INET, link->ifname, "promote_secondaries", true, manager_get_sysctl_shadow(link->manager));
 }
 
 int link_set_sysctl(Link *link) {